fix: correct AO-123 in hardcoded FM list to ASRTU-1 (61781)

User correction: AO-123 is ASRTU-1 (NORAD 61781, launched 2024-11-04,
in orbit), not Fox-1D (43137, re-entered 2024-02). Update the hardcoded
FM set and its tests to include ASRTU-1.

core/data/src/test/java/com/rtbishop/look4sat/core/data/repository/SelectionRepoSearchTest.kt

@@ -114,12 +114,13 @@ class SelectionRepoSearchTest {
 
     @Test
     fun `FM virtual type shows only hardcoded FM satellites`() = runTest {
-        val repo = createRepo(sampleItems)
+        // AO-123 ASRTU-1 (61781) is on the hardcoded FM list; a random
+        // satellite (99999) is not.
+        val items = sampleItems + SatItem(catnum = 61781, name = "ASRTU-1")
+        val repo = createRepo(items)
         repo.setTypes(listOf("AMSAT Live FM"))
         val results = repo.getEntriesFlow().first()
-        // Hardcoded FM list: SO-50 (27607), ISS ZARYA (25544), AO-123 (43137).
-        // Only ISS ZARYA is present in the sample DB.
-        assertEquals(listOf(25544), results.map { it.catnum })
+        assertEquals(setOf(25544, 61781), results.map { it.catnum }.toSet())
     }
 
     @Test
@@ -192,7 +193,7 @@ class SelectionRepoSearchTest {
 
     @Test
     fun `virtual type with no matching satellites shows empty not everything`() = runTest {
-        // 硬编码 FM 列表 (27607/25544/43137) 里没有样本库中的卫星时, 选虚拟
+        // 硬编码 FM 列表 (27607/25544/61781) 里没有样本库中的卫星时, 选虚拟
         // 类型应显示空列表, 而非全部卫星.
         val items = listOf(SatItem(catnum = 7530, name = "AO-7 (AMSAT-OSCAR 7)"))
         val repo = createRepo(items)

core/domain/src/main/java/com/rtbishop/look4sat/core/domain/source/Sources.kt

@@ -57,11 +57,11 @@ object Sources {
     )
     /**
      * Hardcoded AMSAT Live FM satellites (NORAD catnums):
-     * SO-50 (27607), ISS ZARYA (25544), AO-123 Fox-1D (43137).
+     * SO-50 (27607), ISS ZARYA (25544), AO-123 ASRTU-1 (61781).
      * Replaces the AMSAT live-page fetch: stable on any network, no
      * sync-time dependency, no stale-list or timeout failure modes.
      */
-    val amSatFmCatnums = setOf(27607, 25544, 43137)
+    val amSatFmCatnums = setOf(27607, 25544, 61781)
 
     /**
      * Hardcoded AMSAT Live linear (SSB/CW) satellites: